Active transport - Wikipedia, the free encyclopedia
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Active transport is the mediated process of moving particles across a biological membrane against a concentration gradient. If the process uses chemical energy, such as from adenosine triphosphate (A...
en.wikipedia.org/wiki/Active_transport
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ACTIVE TRANSPORT - ENERGY TO TRANSPORT ... Active transport describes what happens when a cell uses energy to transport something. We're not talking about phagocytosis (cell eating) or pinocytosis (cell drinking) in this section. We're talking about the movement of individual molecules across the cell membrane.
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www.biology4kids.com/files/cell2_activetran.html
www.biology4kids.com/files/cell2_activetran.html
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Active Transport - When cells must move materials in an opposite direction - against a concentration gradient. It requires Energy. ... Proteins or Pumps are found in the cell membrane transport molecules across the membrane.
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www.biologycorner.com/bio1/active.html
www.biologycorner.com/bio1/active.html
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This requires energy and is accomplished by active transport. The sodium-potassium pump is an example of this process. A large protein in the plasma membrane provides the doorway through which sodium and potassium ions can move.
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www.mhhe.com/biosci/esp/2002_general/Esp/folder_structu...
www.mhhe.com/biosci/esp/2002_general/Esp/folder_structure/le/m5/s5/lem5s5_4.htm
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Active transport involves a protein which uses ATP to pump molecules against their concentration gradients. The same protein may be used to pump two different substances in opposite directions. This is the case for the very important sodium-potassium pump...
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www.mhhe.com/biosci/esp/2001_gbio/folder_structure/ce/m...
www.mhhe.com/biosci/esp/2001_gbio/folder_structure/ce/m3/s5/index.htm
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Access Excellence Graphics Gallery image and legend: An Antibody Molecule ... Solutes cross cell membranes by passive or active transport. If uncharged solutes are small enough, they can move down their concentration gradients directly across the lipid bilayer itself by simple diffusion.
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www.accessexcellence.org/AB/GG/passActiveTrans.html
www.accessexcellence.org/AB/GG/passActiveTrans.html
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Direct Active Transport ... These concentration gradients are established by the active transport of both ions. And, in fact, the same transporter, called the Na+/K+ ATPase, does both jobs. It uses the energy from the hydrolysis of ATP to...
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users.rcn.com/jkimball.ma.ultranet/BiologyPages/D/Diffu...
users.rcn.com/jkimball.ma.ultranet/BiologyPages/D/Diffusion.html
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Cell ; Cell is... The smallest structural unit of an organism that is capable of independent functioning, consisting of one or more nuclei, cytoplasm, and various organelles, all surrounded by a ... What is an active transport? Active transport is the movement of materials through a cell membrane using energy.
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www.coolcell.blogspot.com/
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